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Interface Development for Web-based Instruction Set Simulator
Hideaki Yanagisawa,Minoru Uehara,Hideki Mori 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
HW/SW codesign tools are necessary to develop new processors in a short period of time, because both the hardware and a software development environment that includes a simulator, assembler, disassembler and compiler, need to be designed for the new processor. We have therefore develped C-DASH, a HW/SW codesign tool for designing processors. In addition, we have developed SSC-DASH (Server-Side C-DASH), which provides a web-based interface enabling processor designers to use C-DASH on the web. This paper describes the interface development for a web-based instruction set simulator in a web-based processor development environment.
Hideaki Soya,Hiroki Yanagisawa,Ippeita Dan 한국체육학회 2009 International journal of human movement science Vol.3 No.2
Recently a growing number of human studies have reported the beneficial influence of acute moderate exercise on cognitive functions. Neurocognitive investigations into such neural substrates have mainly been performed using electroencephalography. However, we recently introduced multichannel functional near-infrared spectroscopy (fNIRS), which is a noninvasive and nonrestrictive optical method to monitor cerebral hemodynamics reflecting regional neural activation. We found improved cognitive performance for Stroop interference elicited by an acute bout of moderate exercise that coincided with enhanced cortical activation in the dorsolateral prefrontal cortex. In a previous study, we set the duration of the exercise at 10 min, but the extent to which we could shorten exercise duration remained uncertain. Thus, here we assessed the effects of various durations of acute exercise on neurocognitive performance during an incongruent Stroop task. We present the first experimental evidence that a minimum of 10 min of acute exercise with an intensity of 50% of the maximum oxygen intake is necessary in order to improve cognitive performance on a Stroop interference test. In combination with facilities enabling strict physiological control, fNIRS is a promising tool that will serve to cultivate a novel application in sports science namely, elucidating, in detail, the cognitive effects of physical exercise.
OBSERVATIONAL EVIDENCE FOR AN IMPACT ON THE MAIN-BELT ASTEROID (596) SCHEILA
Ishiguro, Masateru,Hanayama, Hidekazu,Hasegawa, Sunao,Sarugaku, Yuki,Watanabe, Jun-ichi,Fujiwara, Hideaki,Terada, Hiroshi,Hsieh, Henry H.,Vaubaillon, Jeremie J.,Kawai, Nobuyuki,Yanagisawa, Kenshi,Kuro IOP Publishing 2011 ASTROPHYSICAL JOURNAL LETTERS - Vol.740 No.1
<P>An unexpected outburst was observed around (596) Scheila in 2010 December. We observed (596) Scheila soon after the impact using ground-based telescopes. We succeeded in the detection of a faint linear tail after 2011 February, which provides a clue to determine the dust ejection date. It is found that the dust particles ranging from 0.1-1 mu m to 100 mu m were ejected into the interplanetary space impulsively on December 3.5 +/- 1.0 day. The ejecta mass was estimated to be (1.5-4.9) x 10(8) kg, suggesting that an equivalent mass of a 500-800 m diameter crater was excavated by the event. We also found that the shape of the light curve changed after the impact event probably because fresh material was excavated around the impact site. We conclude that a decameter-sized asteroid collided with (596) Scheila only eight days before the discovery.</P>
INTERPRETATION OF (596) SCHEILA'S TRIPLE DUST TAILS
Ishiguro, Masateru,Hanayama, Hidekazu,Hasegawa, Sunao,Sarugaku, Yuki,Watanabe, Jun-ichi,Fujiwara, Hideaki,Terada, Hiroshi,Hsieh, Henry H.,Vaubaillon, Jeremie J.,Kawai, Nobuyuki,Yanagisawa, Kenshi,Kuro IOP Publishing 2011 ASTROPHYSICAL JOURNAL LETTERS - Vol.741 No.1
<P>Strange-looking dust cloud around asteroid (596) Scheila was discovered on 2010 December 11.44-11.47. Unlike normal cometary tails, it consisted of three tails and faded within two months. We constructed a model to reproduce the morphology of the dust cloud based on the laboratory measurement of high-velocity impacts and the dust dynamics. As a result, we succeeded in reproducing the peculiar dust cloud by an impact-driven ejecta plume consisting of an impact cone and downrange plume. Assuming an impact angle of 45 degrees, our model suggests that a decameter-sized asteroid collided with (596) Scheila from the direction of (alpha(im), delta(im)) = (60 degrees, -40 degrees) in J2000 coordinates on 2010 December 3. The maximum ejection velocity of the dust particles exceeded 100 m s(-1). Our results suggest that the surface of (596) Scheila consists of materials with low tensile strength.</P>